Design and Analysis of 37kV Epoxy Resin Dry-Type Transformer
According to the requirements of dry transformer loss and insulation grade,a new 37kV epoxy resin dry transformer structure with non-uniform distribution of turns in each winding layer is proposed.The iron core of the new structure adopts a 45-degree all-oblique five-step dislocation lap structure with an oblong section.The low-voltage winding has four layers,one turn of copper foil in each of the three inner layers,and three turns of copper foil in the fourth layer.The high voltage winding has two layers,each layer has 12 sections.ANSYS Maxwell and ANSYS Fluent were used to simulate the electromagnetic field and tem-perature field of the dry-type transformer,and the iron loss curve and temperature distribution nephogram of the dry-type trans-former were obtained.The simulation results show that the no-load loss of the dry-type transformer is 4.5561kW,and the tem-perature rise is 95K at room temperature and the temperature rise is 87K at room temperature with 15%overload coefficient.It is verified that the structure can fully meet the requirements of no-load loss of 8000Wand insulation class F.
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NSTL
万方数据
维普
